public Node FunDef()
{
var node = new FunDefNode()
{
AnchorToken = Expect(TokenCategory.IDENTIFIER)
};
Expect(TokenCategory.PARENTHESIS_OPEN);
node.Add(IdList());
Expect(TokenCategory.PARENTHESIS_CLOSE);
Expect(TokenCategory.LLAVE_OPEN);
node.Add(VarDefList());
node.Add(StmtList());
Expect(TokenCategory.LLAVE_CLOSE);
return(node);
}
public void Visit(FunDefNode node)
{
var functionName = node.AnchorToken.Lexeme;
if (isFirstEncounter)
{
if (globalScopeFunctionTable.Contains(functionName))
{
throw new SemanticError("Duplicated function definition: " + functionName, node.AnchorToken);
}
else
{
if (node[0] is IdListNode)
{
var ndecount = 0;
foreach (var subnode in node[0])
{
ndecount++;
}
globalScopeFunctionTable[functionName] = ndecount;
}
else
{
globalScopeFunctionTable[functionName] = 0;
}
}
}
else
{
localScopeSymbolTable = new SymbolTable();
functionDepth = true;
foreach (var subnode in node)
{
Visit((dynamic)subnode);
}
localSymbolTables[functionName] = localScopeSymbolTable;
functionDepth = false;
localScopeSymbolTable = new SymbolTable();
}
}